Stupid RAID question

[Andrej Marjan]

I've been having rotten luck with reliability of 1TB drives, so I'm finally
biting the bullet and trying to figure out RAID. So far I have a tenuous,
but (seemingly) working grasp of how to make device mapper do RAID1 and how
to make it play nice with grub and LVM.

My question: is it possible to do a new install into a sort of "degraded"
RAID1 setup with only a single drive, and then add the second drive later,
or do I need to wait until I acquire the second drive before installing?

Thanks,

Andrej
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